Clip for tentering machines and the like



Nov. 29, 1949 J. DUNGLER 2,489,275

CLIP FOR TENTERING MACHINES AND THE LIKE Filed May 3, 1946 4Shee'ts-Sheetl INVENTOR: Ju/en Dung/er ATTOKN E55 Nov. 29, 1949 J.DUNGLER CLIP FOR TENTERING MACHINES AND THE LIKE 4 Sheets-Sheet 2 FiledMay a, 1946 mam-i.

Nov. 29, 1949 J. DUNGLER CLIP FOR TENTERING MACHINES AND THE LIKE 4Sheets-Sheet 3 Filed May 5, 1946 INJI ENTQL; Julianna/105121: L

Nov. 29, 1949 J. DUNGLER 2,489,275

CLIP FOR TENTERING MACHINES AND THE LIKE Filed May 3, 1946 4Sheets-Sheet 4 Fig. II 5 INVENTOR; Ju/den flung/er ATTORNEHS PatentedNov. 29, 1949 J ulien Dungler, Basel, Switzerland Application May 3,1946, Serial No. 667,053 In France November 24, 1945 11 Claims.

My invention has for its object automatic clips for tentering machines,said clips including a base plate or table forming the lower jaw and anipper plate or faller forming the upper jaw.

It is a recognized fact that such clips show in practice the drawback ofinterfering with a uniform drying of the fabric which is to be heldbecause of the fact that the selvages dry with difiir culty as they areprotected against the action of the currents of hot air on one hand bythe tables and on the other hand by the nipper plates forming the clips.7

My invention has for its object to remove this drawback by producing animproved type of automatic clip through which the action of hot air isadapted to be exerted as directly on the selvages as on the remainder ofthe fabric.

It has moreover for its object an arrangement of said clips allowing thereliable introduction,

. without any risk of damage, of the fabric into the tentering machinein a slack state whatever may be the surplus of fabric overfed and whichmay be as great as desired in accordance with the amount of shrinkagewhich is to be imparted to the selvage of the fabric at regularintervals and separated from one another through gaps or notches insidewhich the selvage of the fabric is allowed to float.

b. The movable nipper plate of the clip may be associated with awave-forming device provided inside the clip and constituted by a seriesof fins or the like elements the number of which is equal to that of thenotches of the table and the position and breadth of which are such aswill allow their engagement into the corresponding notches of the tablewhereby the selvage of the fabric is constrained to form regular wavesinside said notches.

c. The Wave-forming device may be constituted by a series of fins or thelike elements provided on the inner surface of the movable nipper plateor faller of the clip.

d. The wave-forming device may form a system independent of the clip,pivotally secured to a shaft parallel to the plane of the table or basemember and provided with means cooperating with the elements carried bythe movable nipper plate or faller and adapted to make the movements ofthe faller and those of the wave-forming device depend on one anotherwhen the clip is being opened and when it is being automatically closed.

e. The movable nipper plate or faller is preferably provided withnotches arranged in corresponding relationship with those of the tableand shaped so as to execute in a manner known per se a clamping of theselvage through a succession of points-or of short lines perpendicularto or parallel with the selvage.

In order to make my invention more readily understood, I have disclosedby way of example and by no means in a limitative manner diiferent formsof execution of automatic clips provided with the improvements accordingto my invention, said clips being illustrated diagrammatically inaccompanying drawings to which I will now refer. In said drawings:

Figs. 1 and 2 are respectively side and front views of a first form ofexecution of an automatic clip according to my invention, illustrated inits closed position, during the drying of the fabric.

Figs. 3 and 4 are corresponding views of the same clip in its openposition, showing the association of the clip with means for forming" orrendering regular the waves or puckers of the selvage inside the notchesof the clip table.

Fig. 5 illustrates the device for engaging the fabric with its wavyselvage inside the clip.

Figs. 6 and '7 are respectively aside and a front view of a second formof execution-of the clip,

Fig. '7 being drawn at a smaller scale.

1 Figs. 8 and 9 are cross-sectional views through lines VIII+-VIII andIX-IX of Fig. 6 respectively, of the same form of execution, also drawnat areduced scale.

Figs. 10, 11 and 12 show respectively in side, front and horizontalcross-sectional views, a third form of execution of my improved clip. 7

In these different figures, l designatesthe body of the clip, 2 thenipper plate or faller pivotally secured to the axis 3, said fallerending with a nipping portion 4 and including an upper tailpiece 5providing for the opening of the clip when it meets a stationary stop. 6designates the table or base member carrying the selvage of the fabric Iwhich is to be treated. This faller grips the material by. means of theprojection 4 pressed against said fabric or other sheet material.- 8, 9designate the nozzles adapted to blow hot air on to the fabric. I]designates the usual roller preventing the complete closing of the clipas long as it rests on the fabric. When the chain moves apart, thefabric slides under the roller III until it allows the passage of thelatter inside a groove II on the table, which allows the completion ofthe sinking of the faller and the gripping of the fabric.

The table or base member 6 includes a series of bars 6| equally spacedone with reference to the other and separated by slots or notches 62.The width of these slots is chosen such that the selvage of the fabric"may freely form waves or puckers therein without being however toolarge in order to avoid a deformation of theselvage. under the action ofthe tractional stresses. The. faller 2 is provided with notches 22,projections 2| being formed between said notches 22 of the faller whichprojections correspond to bars SI of the grid or comb forming the tableor base member 6. The shape of said projections 2| and bars 6| is suchthat they make point contacts. Bars 6| forming theteeth of thecomb-shaped base member 6 have tapering side walls 6111 (Fig. 2.).

By reason of the constitution of the table or base member 6 undertheform of a grid or comb and of the presence of the notches 22 inthetaller 2', the drying fluid constituted in the case considered by hotair blown through the nozzles & and 9 acts directly and completely onthe selvage, the nozzle 9 being provided if required with lateralopenings allowing the oblique jets to be directed through the notches inthe fall-er.

The regular laying of the edges of the fabric on the table or basemember of the clip may be executed for instance (Figs. 3 and 4) by usinga jet of compressed air or of steam blown by a nozzle l2: on to thetable, said blowing being executed before the. complete closing of thefallet.

The regular introduction of the fabric into the clip may also be ensuredthrough a set of two endless strips of yielding material shownrespectively at [3 and N: (Fig. 5), the lower strip I 3 being preferablyprovided with notches corresponding with those of the clip; a blower l5expands the selvage of the fabric. into wave shaped formation and: thefaller 2 of the clip may close without risking any double clampingaction.

Reverting to the form of execution illustrated in Figs. 6 to 9, itincludes a fabric plaiting or wave-forming device constituted by ribs orfins 23 disposed rearwardly of the faller. The number of said. fins orribs is equal to that of the slots E2 of the table. 6 said fins beingadapted to engage said slots at. the moment of the closing of the,

taller I502; which grips the selvage of the fabric only when the latterwill have moved from underneath the: fins 23.. -The latter by reason oftheir own weight increased by that of the faller I 02 make up for allthe surplus of fabric and constrain said fabric to: assume a more orless marked sinusoidal shape. This. avoids the use of blowing means.although of course it is possible to associate both methods.

In the form of execution: of Figs. to 12 the wave forming device isconstituted by a series of blades or fins l1 plvotally secured to ashaft l8 parallel. with the plane of the. table. Two central finsinclude an upper projecting portion l-l'l' defining a slide H2 insidewhich is engaged a rod t9 connecting two lugs 24 provided on the innersurface.- of the faller 202. When the faller is brought into its openposition, its rocking produces through the agency of the rod. l9- therising motion of the projections H t and consequently of thewave-forming device as a whole until the latter enters the positionillustrated in dotted lines in Fig. 10. At the moment at which therelease of the tail-piece of the faller allows the latter to fall back,the fins I! rest on the fabric 1 which assumes a sinusoidal shape. Thefaller does not close completely by reason of the slope H3 holding therod I9. When, the chains moving apart, the fabric disengages said fins,the latter sink downwardly into the notches of the table so that thefaller 2 may completely close the clip and clamp the fabric.

In practice, the table 6 is preferably constituted by a ribbed or combplate made of an inoxidisable metal and having a reduced thickness inorder to assume a certain elasticity. Through this elasticity, ifcertain ribs forming the bars 6| of the grid plate come into contactwith the fins 23 of the faller I02 before the others, they yieldsomewhat under the action of pressure until the latter is borne by allthe ribs simultaneously.

Obviously it is possible without widening the scope of my invention toimagine various modifications and detail improvements therefor, Whileremaining within the scope of accompanying claims. 1

Having thus described the invention, what is claimed as new and desired"to be secured by Letters Patent, is:

1. A tenter clip for treating fabrics, comprising a plurality of barsforming a base member and in parallel spaced apart relationperpendicular to the location of the selvage of the fabricto be treated,the upper surface of said bars being substantially convex shaped, a bodymember, a shaft carried by said body member and disposed parallel to theselvage of the fabric, a faller rotatably mounted on said shaft andhaving a plurality of teeth, said teeth being in alinement with saidbars and having convex shaped end surfaces for co-action with said firstmentioned convex surfaces of said bars, whereby the contact between saidsurfaces of the teeth and bars is substantially a linear one, and meansfor urging the fabric into the spaces between said bars before the clipis closed.

2. A tenter clip for engaging sheet material comprising a base member,said base member including a plurality of spaced apart bars arrangedsubstantially parallel to each other to permit unobstructed passage ofdrying fluid to the selvedge of the material, a body member, a fallermounted onfsaid' body member for pivotal movement and extending to gripsaid material against said base member in engaging position of saidfaller, and means for forming waves in said sheet material within thespaces betweensaid bars, said wave-forming means being connected formovement with said faller and being located between said faller and saidbase member.

3. A tenter clip for engaging sheet material comprising a base member,said base member including a plurality of spaced apart bars arrangedsubstantially parallel to each other to permit unobstructed passage ofdryingfluid to the selvedge of the material, a body member, a fallermounted on said body member for pivotal movement and extending to gripsaid material against said base member in engaging position of saidfaller, and means for forming waves in said sheet material between saidbars and positioned in proximity and rearwardly of said faller.

4. A tenter clip according to claim 3, wherein said wave-forming meansare spaced rollers, and an axle connected to said faller and rotatablysupporting said rollers, said rollers being disposed for positionbetween said bars, respectively. in said engaging position of saidfaller.

5. A tenter clip according to claim 3, wherein said base member forms aflexible comb whose teeth are constituted by said bars, whereby a giveis obtained when pressure is exerted by said faller during grippingengagement thereof.

6. A tenter clip according to claim 3, wherein said bars includetapering side walls.

7. A tenter clip for engagement of sheet material comprisingbase-forming comb means with spaced apart open slots providingtransverse passages through said comb means, a body member, faller meanspivotally mounted for swinging movement on said body member, whereby inengaging position of said faller means a portion of said material ispressed by said faller means against the upper surface of said comb,whereas another portion of said material floats in said slots, and meansfor urging said other portion of said material into said slots andoperatively con-- nected with said faller means.

8. A tenter clip according to claim '7, wherein said latter means arepositioned rearwardly of and between said faller means and said bodymember.

9. A tenter clip according to claim '7, wherein said comb means forms aplate supported by said body member.

10. A tenter clip for engaging sheet material, comprising a base memberhaving a forward edge, a faller movable for position to grip saidmaterial against said base member, a body member pivotally supportingsaid faller to permit swinging movement of said faller toward and awayfrom said base member, said base member being provided with spaced apartslots opening into said forward edge of said base member, spaced apartfabric distributing means fitting said slots and connected with saidfaller for cooperation with the latter, said faller and saiddistributing means being so related to each other that the lowermostedge of the distributing means is at a level lower than that of thelowermost edge of said faller in material gripping position.

11. A tenter clip for engaging sheet material, comprising a base memberhaving a forward edge, a faller movable for position to grip saidmaterial against said base member, a body member pivotally supportingsaid faller to permit swinging movement of said faller toward and awayfrom said base member, said base member being pro vided with equallyspaced slots opening into said forward edge of said base member, spacedapart fabric distributing means fitting said slots and connection saidfaller for cooperation with the latter, the number of said spaced apartdistributing means corresponding to the number of said slots, saidfaller and said distributing means being so related to each other thatthe lowermost edge of the distributing means is at a level lower thanthat of the lowermost edge of said faller in material gripping position.

JULIEN DUNGLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,890,449 Berry Dec. 13, 1932FOREIGN PATENTS Number Country Date 378,202 Great Britain Aug. 11, 1932

